Short-Term Response of Chlorophyll-a Concentration to Change in Sea Surface Wind Field over Mesoscale Eddy SCIE SCOPUS

Cited 8 time in WEB OF SCIENCE Cited 6 time in Scopus
Title
Short-Term Response of Chlorophyll-a Concentration to Change in Sea Surface Wind Field over Mesoscale Eddy
Author(s)
Park, Ji-Eun; Park, Kyung-Ae; Kang, Chang-Keun; Park, Young-Je
KIOST Author(s)
Park, Young Je(박영제)
Publication Year
2020-05
Abstract
Short-term biological responses to sea surface wind field over mesoscale eddies were investigated using hourly ocean color chlorophyll-a (chl-a) concentration data from the Geostationary Ocean Color Imager (GOCI), scatterometer wind data, and satellite sea surface temperature (SST) data. Four warm eddies were identified from SST fronts, by subjectively fitting ellipses to selected points, and anticyclonically rotating current vectors were estimated from sequential chl-a images. Scatterometer data confirmed wind speed strengthening by approximately 30% over anticyclonic eddies, regardless of wind direction, caused by stability changes in the marine atmospheric boundary layer. The modified wind speed field produced a characteristic pattern of wind stress curl and Ekman pumping (EKP) over the eddies, showing positive and negative values on the left and right sides of the upwind direction, respectively. The EKP field was divided into three components: eddy current-induced, relative vorticity gradient-induced, and crosswind SST-induced terms. Short-term changes in the chl-a concentration showed a positive relation with EKP variations over most eddies. SST-induced EKP played a significant role in the eddies for 76% of the total variations, which is much higher than that in other oceans. This study emphasizes the significant effect of SST distribution and the biological responses to changes in an EKP field in relation to air-sea interactions and feedback processes in the East Sea (Sea of Japan).
ISSN
1559-2723
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/38672
DOI
10.1007/s12237-019-00643-w
Bibliographic Citation
ESTUARIES AND COASTS, v.43, no.3, pp.646 - 660, 2020
Publisher
SPRINGER
Subject
GULF-STREAM RINGS; SATELLITE-OBSERVATIONS; TEMPERATURE FRONTS; DIURNAL VARIATION; NORTH PACIFIC; OCEAN FRONTS; EDDIES; PHYTOPLANKTON; VARIABILITY; VELOCITIES
Keywords
Mesoscale eddy; Chlorophyll-a; Ekman pumping; Sea surface wind; Sea surface temperature; Geostationary Ocean Color Imager (GOCI)
Type
Article
Language
English
Document Type
Article
Publisher
SPRINGER
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